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Operating Manual 1302.6163.12 - 03
8.9
R&S ESU
Maintenance and Instrument Interfaces
Instrument Interfaces
8.3.3.4
Control Characters
For interface control, several strings are defined and control characters are reserved
which are based upon GPIB control.
8.3.3.5
Handshake
Software handshake
In the software handshake mode of operation, the data transfer is controlled using
the two control characters XON / XOFF.
The instrument uses the control character XON to indicate that it is ready to receive
data. If the receive buffer is full, it sends the XOFF character via the interface to the
controller. The controller then interrupts the data output until it receives another XON
from the instrument. The controller indicates to the instrument that it is ready to
receive data in the same way.
Cable required for software handshake
The connection of the instrument with a controller for software handshake is made
by crossing the data lines. The following wiring diagram applies to a controller with a
9-pin or 25-pin configuration.
Fig. 8.53 Wiring of the data lines for software handshake
Control string or character
Function
'@REM'
Switch over to remote
'@LOC'
Switch over to local
'@SRQ'
Service Request SRQ (SRQ is sent by the instrument)
'@GET'
Group Execute Trigger (GET)
'@DCL'
Reset instrument (Device Clear DCL)
<Ctrl Q> 11 Hex
Enables character output / XON
<Ctrl S> 13 Hex
Inhibits character output / XOFF
0D Hex, 0A Hex
Terminator <CR>, <LF>
Controller
25-pin
Instrument
9-pin
1
2
3
4
5
6
7
8
9
Controlller
9-pin
Instrument
9-pin
1
2
3
4
5
6
7
8
9
1
3
2
6
5
4
8
7
9
8
2
3
6
7
20
5
4
22
RxD / TxD
TxD / RxD
GND / GND
RxD / TxD
TxD / RxD
GND / GND
Содержание ESU Series
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Страница 25: ......
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Страница 31: ...R S ESU Manual Operation 3 2 Operating Manual 1302 6163 12 03...
Страница 349: ...R S ESU Instrument Functions Basic Settings 4 318 Operating Manual 1302 6163 12 03...
Страница 405: ...R S ESU Instrument Functions User Port 4 374 Operating Manual 1302 6163 12 03...
Страница 439: ...R S ESU Remote Control Basics Status Reporting System 5 34 Operating Manual 1302 6163 12 03...
Страница 821: ...R S ESU Remote Control Programming Examples More Complex Programming Examples 7 32 Operating Manual 1302 6163 12 03...
Страница 841: ...R S ESU Error Messages Device Specific Messages 9 10 Operating Manual 1302 6163 12 03...
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